G3D Innovation Engine is a fully featured, cross platform game engine. This is a 3D engine written in C/C++. It is a commercial-grade, open source engine for different platforms i.e. Windows, Linus and Mac OS. The engine is licensed under BSD-2 license and mainly used for teaching purpose.
Gambryo is a cross-platform game engine written in C++. It is a suit of several C++ libraries, plug-ins and run-time libraries. The engine supports several platforms like Windows, Android, Mac, Linux, iOS, Wii, Wii Ware, Xbox, Xbox 360, Xbox One, PS X, PS 2, PSP, PS3 and PS4.
Frostbite is a powerful game engine developed by DICE Company in 2008. This Game Engine is written in C++ and C#. It develops games for PS3, PS4, Xbox 360 and Xbox one. It exclusively develops games for electronic Arts and specializes for FPS (First Person Shooter) games.
Exult is a FOSS (Free and Open Source Software) game Engine. It is written in C++ and runs on Mac, Windows and Linux. Exult was developed in 2004 to recreate a massive hit game of 1990’s called Ultima VII. It is created for the revival of Ultima VII (The Black Gate) and Ultima VII part2 (Serpent Isle) on modern PCs.
The word Esenthel is made by combining two words i.e. Essential and Essence. It is an open source game engine for developing commercial and noncommercial games (it is not Free, there are some limitations, i.e. its code cannot be used to create/improve other game engines.). It is written in C++ and is very easy to use. It uses very clean APIs. It is in development since 2000.
DX Studio produced by Worldweaver Ltd is an integrated development tool used to build 3D video games, simulations, or real-time interactive applications for either standalone, web-based, Microsoft Office or Visual Studio use. Written in C++, DX Studio is available to users in both standard and professional editions.